Bearing for spindles



(No Model.)

7 J. KILBURN.

BEARING FOR SPINDLES.

a o aaiat J PL Patented Sept. 21,1897.

i i a INVENTEIR J wwm WITNESSES UNITED STATES PATENT OFFICE.

V In

BEARING FOR SPINDLES.

SPECIFICATION forming part of Letters Patent No. 590,314, dated September 21, 1897.

Application filed December 2, 1896. Serial No. 614,250. (No model.)

To (all whom it may concern:

Be it known that 1, JOHN KILBURN, a citizen of the United States, residing at Belmont, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Bearings for Spindles; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

As spindles of the self-centering or top type are commonly mounted it is of the greatest importance that the bolster or tubular support within which the spindle rotates should be freely movable to allow the spindle to find its true center of rotation underan unbalanced load and that the bolster should at the same time be restrained from rotation with the spindle.

Various devices have heretofore been. proposed to secure the results above suggested, but such devices, in so far as I am informed of the art, have been found tobe objectionable in that they impede the operation of the spindle or are too sensitive and liable to get out of repair; and the principal object of the present invention is to provide a simple and durable device 'to be substituted therefor.

Another object of the present invention is to provide an improved means for adjusting the step or bearing-point of the bottom of the spindle to raise the spindle in the bolster to prevent the pintle of the spindle, which commonly tapers toward its lower end, from binding upon the walls of the bolster as the lower end of the spindle wears oif or into the step.

To the above ends the present invention consists of the devices and combinations of devices herein after m ore particularlyset forth in this specification, and pointed out in the claims.

The present invention is illustrated in the accompanying drawings, in which- Figure 1 is a vertical section through a spindle-support embodying the same, showing the spindle in elevation. Fig. 2 is avertical section through the lower portion of the bolster-case, parts appearing in elevation,

showing a modified form of the present invention. Figs. 3 and tare similar viewsillustrating other modifications.

In the drawings, A represents the spindle, having the usual tapered pintle a, B its whirl, O the bolster, conveniently surrounded by the usual wicking or other elastic packing c, D the bolster-case, and E the spindle-rail, all of which parts, except as hereinafter specified, may be and conveniently are of any usual or convenient construction and in themselves form no essential feature of the present invention.

H represents the rest or bearing for the lower end of the spindle, commonly termed the step.

I have shown in the drawings two forms of connections for the step and bolster, in one of which the step H is inserted with a tight driving fit in the bottom of the bolster C, (see Figs. 1, 2, and 3,) an arrangement to be hereinafter referred to, and in the other the step H is threaded and screwed into threaded bearings in the bottom of bolster C, a checknut 0 being provided to lock the step H in the required position.

In accordance with the present invention the step H is supported on a pintle L, which rests upon a suitable support and is free to tip laterally in all directions.

As shown in the drawings, the pintle L is circular in section and slightly less in diameter than the bore of the bolster-case D, so that its lateral movement is limited by contact therewith; but I desire to say that while I prefer to make the pintle L of substantially the form shown, on account of the strength and simplicity of the arrangement,- I do not wish to limit my invention thereto, as the pintle L may be varied in form and relative size and other means provided to limitits lateral movement without any departure from the present invention.

The pintle L rests upon a suitable support, preferably the base of the bolster-case D, and the base Z of said pintle L is shaped to allow the pintle to tip freely, as hereinbefore stated,

the base Z, as shown in the drawings, being conical in shape.

The step H (or H) is loosely connected with the pintle L either by a tongue 19, projected therefrom and engaging a recess 1) upon the pintle L, (see Figs. 1, 2, and 4,) or by a re verse arrangement, in which the tongue 11 is formed upon the pintle L and the recess P3 in the step H, (see Fig. 3,) or by other suitable means which will not interfere with the free lateral movement of the pintle.

To restrain the bolster C from rotation, I prefer to restrain the pintle L by its connection withthe bolster-case and the bolster O by its connection with the pintle L.

I have shown in the drawings two methods of restraining the pintle L from rotation, one' by means of the pins Z, driven through the walls of the bolster-case D (see Figs. 1, 3, and 4) and engaging vertical slots Z in the pintle L, and the other by means of the polygonal tongue Z projected from the pintle L and engaging a correspondingly-shaped recess Z in the base of the bolster-case D. It is evident, however, that other methods of restraining the pintle L may-be used without any departure from the essential features of the present invention.

To restrain the bolster G from rotation with reference to the pintle, the tongue 19 (or 13 and the recess p (or 39 are formed of a similar shape in section, the recess 19 (or 19 being slightly larger in section, so that the tongue 1) (or 19 byits engagement therewith restrains the step H, and hence the bolster c, from rotation without interfering with the free lateral movement of the pintle L or bolster C.

It will be noted that in the form of my invention shown in Figs. 1, 2, and 3 of the drawings, in which the driving-step I-Iis supported upon the pintle L, the pintle L forms a firm support for the step H, capable of withstanding the shock of a blow 011 the bolster sufficient to drive the step into the bolster, so that the step H can be adjusted within the bolster 0 without removing thebolster from the case, a feature which I deem of great importance as greatly facilitating the adj ustment of the bolster and step to secure the proper position of the spindle in the bolster.

Having thus described my invention and its mode of operation, I claim as novel and desire to secure by Letters Patent of the United States 1. In aspindle-snpport the combination with a bolster, of a step heldby a driving fit within the bolster, and a loosely-held pintle supporting the step, substantially as described.

2. In a spindlesupport the combinationwithin the bolster, and a support for the step within the bolster-case, formed and arranged to support the step while the bolster is driven onto the same, substantially as described.

4. In a spindle-support the combination with the bolster-case and bolster, of a step carried by the bolster, a loosely-held pintle free to tip laterally in all directions supporting the step, connections between the pintle and bolster-case and the pintle and step whereby the bolster is restrained-from rotation, substantially as described.

5. In a spindle-support, the combination with the bolster of a loosely-held pintle supporting the same and free to tip laterally in all directions, and means for restraining the pintle from rotation substantially as described.

6. Ina spindle-support, the combination with the bolster-case and-the bolster, of a loosely-held pintlesupporting the bolster and free to tip laterally in all directions, saidpintle being provided with a bodyv portion fitted loosely to the bore of the bolster-case and arranged tolimit the lateral movement of the pintle by contact with the bolster-case, substantially as described.

7. In a spindle-support, the combination with the bolster and a step movable along the bolster, of a pintle free to tip laterally in all directions supporting the step, and a cooperating tongue and recess upon the step and pintle, whereby the 'stepis held in position upon the pintle without interfering with the lateral movement of the pintle, substantially as described.

8. In aspindle-support the combination with the bolster-case and bolster, of a step, a pintle supporting the step, engagingpolygonal tongues and recesses upon the step, pintle and bolster-case, substantially as described.

9. In a spindle-support, the combination with a bolster, of a step within the bolster movable longitudinally along the bolster, and

a pintle free to tip in all directions supporting the step, substantially as described.

10. In a spindle-support, the combination with a bolster, of a step movable longitudir nally within the bolster, and a pintle supporting the step and restraining it from rotation, substantially as described.

11. In a spindle-support, the combination with a bolster having a step fitted within the same, of a loosely-held pintle supporting the step, and free to tip laterally in all directions, substantially as described.

' In testimony whereof I affix my signature in presence of two witnesses.

JOHN KILBURN.

Witnesses A. E. WHYTE, A. O. ORNE. 

